The polar opposites of yin and yang represent the process of dialectics — each pole produces the other in an eternal cycle of reversal. Dialectics is abstractly concentrated in the notion of adjointness.

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The term ontologos is a neologism meaning “to reason about being.” It is constructed from the prefix onto- that means “being” or “existence,” and the base logos that means “to reason,” referring to the science that deals with the principles and criteria of validity of inference and demonstration – the science of the formal principles of reasoning.